.page-faq {
  --faq-accent: var(--signal-orange);
  --faq-rule: var(--ink-500);
  --faq-surface: var(--ink-700);
  --faq-gap: clamp(24px, 4vw, 48px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(20px, 3vw, 34px) clamp(40px, 6vw, 76px);
}

.page-faq .faq-hero .breadcrumbs {
  margin-block-end: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--glow-amber);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--white-soft);
}

.page-faq .faq-hero .lede {
  margin: 0 0 22px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist-200);
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--faq-rule);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-hero__caption {
  margin-block-start: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-200);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-main {
  padding-block: clamp(36px, 5vw, 72px);
}

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-stream {
  min-width: 0;
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-rail {
  border: 2px solid var(--faq-rule);
  background: var(--faq-surface);
  padding: 16px 14px;
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist-200);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 8px;
  border-inline-start: 2px solid transparent;
  color: var(--mist-200);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.35;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-rail__link[data-accent="orange"] {
  --faq-dot: var(--signal-orange);
}

.page-faq .faq-rail__link[data-accent="celadon"] {
  --faq-dot: var(--celadon);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--white-soft);
  background: rgba(36, 64, 92, 0.4);
}

.page-faq .faq-rail__link.is-current {
  color: var(--white-soft);
  border-inline-start-color: var(--faq-dot, var(--signal-orange));
  background: rgba(36, 64, 92, 0.4);
}

.page-faq .faq-rail__dot {
  flex: 0 0 auto;
  inline-size: 8px;
  block-size: 8px;
  border-radius: 50%;
  background: var(--faq-dot, var(--signal-orange));
}

.page-faq .faq-rail__num {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-500);
}

.page-faq .faq-rail__link:hover .faq-rail__num,
.page-faq .faq-rail__link.is-current .faq-rail__num {
  color: var(--mist-200);
}

.page-faq .faq-rail__name {
  min-width: 0;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  scroll-margin-block-start: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-block-start: clamp(40px, 5vw, 68px);
}

.page-faq .faq-group[data-accent="orange"] {
  --faq-accent: var(--signal-orange);
}

.page-faq .faq-group[data-accent="celadon"] {
  --faq-accent: var(--celadon);
}

.page-faq .faq-group__head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding-block-end: 14px;
  border-block-end: 2px solid var(--faq-rule);
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-end: -2px;
  inline-size: 72px;
  block-size: 2px;
  background: var(--faq-accent);
}

.page-faq .faq-group__num {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--white-soft);
}

.page-faq .faq-group__note {
  flex-basis: 100%;
  margin: 0;
  padding-block-start: 2px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-200);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  margin-block-start: 20px;
}

.page-faq .faq-item {
  border: 2px solid var(--faq-rule);
  background: var(--faq-surface);
  margin-block-end: 10px;
  transition: border-color 0.18s ease;
}

.page-faq .faq-item:hover,
.page-faq .faq-item:focus-within {
  border-color: var(--glow-amber);
}

.page-faq .faq-item[open] {
  border-color: var(--glow-amber);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--white-soft);
  font-size: 16px;
  line-height: 1.55;
}

.page-faq .faq-item__summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__summary::marker {
  content: "";
}

.page-faq .faq-item__q {
  display: inline-block;
  padding: 2px 6px;
  border: 1px solid var(--faq-accent);
  color: var(--faq-accent);
  font-size: 11px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.page-faq .faq-item__title {
  min-width: 0;
}

.page-faq .faq-item__mark {
  position: relative;
  inline-size: 14px;
  block-size: 14px;
  flex: 0 0 auto;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  inset-inline-start: 50%;
  inset-block-start: 50%;
  transform: translate(-50%, -50%);
  background: var(--mist-200);
}

.page-faq .faq-item__mark::before {
  inline-size: 14px;
  block-size: 2px;
}

.page-faq .faq-item__mark::after {
  inline-size: 2px;
  block-size: 14px;
  transition: opacity 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
}

.page-faq .faq-item__panel {
  padding: 4px 18px 18px;
  margin-block-start: 2px;
  border-block-start: 1px solid var(--faq-rule);
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-200);
}

.page-faq .faq-item__panel > p {
  margin: 14px 0 0;
}

.page-faq .faq-item__panel ol {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .faq-item__panel ol > li {
  counter-increment: faqstep;
  position: relative;
  padding-inline-start: 34px;
  margin-block-end: 10px;
}

.page-faq .faq-item__panel ol > li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--faq-accent);
}

.page-faq .faq-item__panel ol > li::after {
  content: "";
  position: absolute;
  inset-inline-start: 15px;
  inset-block-start: 22px;
  inset-block-end: -10px;
  inline-size: 1px;
  background: var(--faq-rule);
}

.page-faq .faq-item__panel ol > li:last-child {
  margin-block-end: 0;
}

.page-faq .faq-item__panel ol > li:last-child::after {
  display: none;
}

.page-faq .faq-item__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-block-start: 14px;
}

.page-faq .faq-item__actions .copy-btn {
  font-size: 13px;
}

/* ---------- 通用小标题 ---------- */
.page-faq .faq-head {
  margin-block-end: clamp(24px, 3vw, 40px);
}

.page-faq .faq-head__eyebrow {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--clay-600);
}

.page-faq .faq-head__title {
  margin: 0 0 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-faq .faq-head__note {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-700);
}

/* ---------- 自助排查（暖纸色带） ---------- */
.page-faq .faq-selfcheck {
  padding-block: clamp(48px, 7vw, 96px);
  color: var(--ink-900);
  scroll-margin-block-start: var(--header-h);
}

.page-faq .faq-selfcheck__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-selfcheck__figure {
  margin: 0;
}

.page-faq .faq-selfcheck__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--ink-900);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-steps {
  list-style: none;
  counter-reset: sc;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-faq .faq-steps li {
  counter-increment: sc;
  position: relative;
  padding-inline-start: 50px;
}

.page-faq .faq-steps li::before {
  content: "0" counter(sc);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: -3px;
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--clay-600);
}

.page-faq .faq-steps li::after {
  content: "";
  position: absolute;
  inset-inline-start: 12px;
  inset-block-start: 26px;
  inset-block-end: -22px;
  inline-size: 1px;
  background: var(--paper-300);
}

.page-faq .faq-steps li:last-child::after {
  display: none;
}

.page-faq .faq-steps__title {
  display: block;
  margin-block-end: 5px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink-900);
}

.page-faq .faq-steps__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-700);
}

/* ---------- 提交路径 ---------- */
.page-faq .faq-submit {
  padding-block: clamp(48px, 7vw, 92px);
  scroll-margin-block-start: var(--header-h);
}

.page-faq .faq-submit__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-submit__eyebrow {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--glow-amber);
}

.page-faq .faq-submit__title {
  margin: 0 0 12px;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--white-soft);
}

.page-faq .faq-submit__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-200);
}

.page-faq .faq-submit__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-submit__list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--faq-rule);
  background: var(--ink-900);
  font-size: 15px;
  line-height: 1.6;
  color: var(--white-soft);
}

.page-faq .faq-submit__idx {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal-orange);
  padding-block-start: 3px;
}

.page-faq .faq-submit__channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-block-start: clamp(28px, 4vw, 44px);
  padding-block-start: clamp(24px, 3vw, 34px);
  border-block-start: 2px solid var(--faq-rule);
}

.page-faq .faq-channel {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-faq .faq-channel__key {
  flex: 0 0 auto;
  min-inline-size: 80px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--celadon);
}

.page-faq .faq-channel__val {
  min-width: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--white-soft);
  word-break: break-word;
}

.page-faq .faq-submit__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-block-start: clamp(26px, 4vw, 40px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-rail__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-submit__channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-channel:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-selfcheck__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-faq .faq-submit__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-faq .faq-submit__list li {
    padding: 15px 18px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: clamp(36px, 4vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-rail__list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>